How can I get 6 explosive power?

//ads -- adsterra.com -- native banner
?>
There's some rubble I can't get past in the cave where my Nemesis is. Apparently I need to have 6 explosive power to get past it, but I have no idea what that means or how I acquire it.
How do I get 6 explosive power so I can get past the impassable rubble?
Pictures about "How can I get 6 explosive power?"



Get 6 explosive kills | hitman sniper | walkthrough
Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.
Images: Ylanite Koppens, cottonbro, Erik Mclean, ANTONI SHKRABA